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Goodwill and Other Intangibles
9 Months Ended
Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangibles

6. Goodwill and Other Intangibles

Changes in the carrying amount of goodwill for the periods ended September 30, 2013 and December 31, 2012 by reportable segment are as follows (in thousands):

Bank Institutional
Investment
Management
Asset
Servicing
Total

Balances as of January 1, 2012

$ 144,109 $ 47,529 $ 19,476 $ 211,114

Goodwill disposals during period

(1,356 ) (1,356 )

Balances as of December 31, 2012

$ 142,753 $ 47,529 $ 19,476 $ 209,758

Balances as of January 1, 2013

$ 142,753 $ 47,529 $ 19,476 $ 209,758

Balances as of September 30, 2013

$ 142,753 $ 47,529 $ 19,476 $ 209,758

Following are the intangible assets that continue to be subject to amortization as of September 30, 2013 and December 31, 2012 (in thousands):

As of September 30, 2013
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount

Core deposit intangible assets

$ 36,497 $ 31,399 $ 5,098

Customer relationships

103,960 51,236 52,724

Other intangible assets

3,247 2,320 927

Total intangible assets

$ 143,704 $ 84,955 $ 58,749

As of December 31, 2012

Core deposit intangible assets

$ 36,497 $ 30,403 $ 6,094

Customer relationships

103,960 42,399 61,561

Other intangible assets

3,247 2,099 1,148

Total intangible assets

$ 143,704 $ 74,901 $ 68,803

Following is the aggregate amortization expense recognized in each period (in thousands):

Three Months Ended
September 30,
Nine Months Ended
September 30,
2013 2012 2013 2012

Aggregate amortization expense

$ 3,245 $ 3,643 $ 10,054 $ 11,228

Estimated amortization expense of intangible assets on future years (in thousands):

For the three months ending December 31, 2013

$ 3,164

For the year ending December 31, 2014

12,146

For the year ending December 31, 2015

9,550

For the year ending December 31, 2016

8,342

For the year ending December 31, 2017

7,098